Md. Code Regs. - Visible Emissions from Ships

A person or agent may not cause or permit the discharge of emissions from any ship in excess of the following limits:

Operating Mode Chart Number Allowable Time
A. Underway, at berth, or at anchor 20%-1 No limit.
B. Soot blowing: (1) Underway within 1 mile (1.6 kilometer) of any shore - No soot blowing allowed.
(2) At berth or anchor: (a) Within first or last 24 hours of arrival or departure - No soot blowing allowed.
(b) Any other 24-hour period No limit. 15 minutes for each boiler in operation provided that no nuisance is created.
C. Cleaning and adjusting of combustion equipment while at berth or anchor 40%-2 Not to aggregate more than 4 minutes in any 60-minute period.
D. Start-up of cold boiler or engine No limit 5 consecutive minutes.
60%-3 10 consecutive minutes additional.
E. Anchoring, berthing, or other maneuvering requiring rapid changes in power 80%-4 No limit.
F. Upset/breakdown/emergency casualty or Coast Guard safety tests No limit No limit. The control officer shall be notified as to the reason for the excessive emissions.
G. Docktrials of new or rebuilt boilers or engines No limit No limit provided a nuisance is not created and the control officer has been notified before 3 p.m. the day before the docktrials are to be conducted.


Md. Code Regs.
Regulation .01 adopted effective November 19, 1983 (10:20 Md. R. 1786)
Regulations .01 amended as an emergency provision effective January 25, 1989 (16:3 Md. R. 338)
Regulations .01 recodified effective June 26, 1989 (16:10 Md. R. 1110)

State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.

No prior version found.